SN74ACT7814_TI 64 x 18 异步 FIFO 存储器

SN74ACT7814的基本参数

制造厂商：TI
产品类别：逻辑和电压转换
技术类目：专用逻辑 IC - FIFO 内存 IC
功能描述：64 x 18 异步 FIFO 存储器
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SN74ACT7814的产品详情：

A FIFO memory is a storage device that allows data to be written into and read from its array at independent data rates. The SN74ACT7814 is a 64-word by 18-bit FIFO for high speed and fast access times. It processes data at rates up to 50 MHz and access times of 15 ns in a bit-parallel format.

Data is written into memory on a low-to-high transition at the load clock (LDCK) input and is read out on a low-to-high transition at the unload clock (UNCK) input. The memory is full when the number of words clocked in exceeds the number of words clocked out by 64. When the memory is full, LDCK signals have no effect on the data residing in memory. When the memory is empty, UNCK signals have no effect.

Status of the FIFO memory is monitored by the full (FULL\), empty (EMPTY\), half-full (HF), and almost-full/almost-empty (AF/AE) flags. The FULL\ output is low when the memory is full and high when the memory is not full. The EMPTY\ output is low when the memory is empty and high when it is not empty. The HF output is high when the FIFO contains 32 or more words and is low when it contains 31 or fewer words. The AF/AE status flag is a programmable flag. The first one or two low-to-high transitions of LDCK after reset are used to program the almost-empty offset value (X) and the almost-full offset value (Y) if program enable (PEN\) is low. The AF/AE flag is high when the FIFO contains X or fewer words or (64 - Y) or more words. The AF/AE flag is low when the FIFO contains between (X + 1) and (63 - Y) words.

A low level on the reset (RESET\) input resets the internal stack pointers and sets FULL\ high, HF low, and EMPTY\ low. The Q outputs are not reset to any specific logic level. The FIFO must be reset upon power up. The first word loaded into empty memory causes EMPTY\ to go high and the data to appear on the Q outputs. It is important to note that the first word does not have to be unloaded. The data outputs are noninverting with respect to the data inputs and are in the high-impedance state when the output-enable (OE\) input is high.

The SN74ACT7814 is characterized for operation from 0°C to 70°C.

SN74ACT7814的优势和特性：

Member of the Texas Instruments WidebusTM Family
Load Clock and Unload Clock Can Be Asynchronous or Coincident
64 Words by 18 Bits
Low-Power Advanced CMOS Technology
Full, Empty, and Half-Full Flags
Programmable Almost-Full/Almost-Empty Flag
Fast Access Times of 15 ns With a 50-pF Load and All Data Outputs Switching Simultaneously
Data Rates up to 50 MHz
3-State Outputs
Pin-to-Pin Compatible With SN74ACT7804 and SN74ACT7806
Packaged in Shrink Small-Outline 300-mil Package Using 25-mil Center-to-Center Spacing

Widebus is a trademark of Texas Instruments Incorporated.

SN74ACT7814的参数（英文）：

Supply voltage (Min) (V)
4.5
Supply voltage (Max) (V)
5.5
Input type
TTL-Compatible CMOS
Output type
3-State
Clock Frequency (Max) (MHz)
50
Features
Programmable Flags, Unidirectional

SN74ACT7814具体的完整产品型号参数及价格（美元）：

SN74ACT7814的完整型号有：SN74ACT7814-20DL、SN74ACT7814-40DL，以下是这些产品的关键参数及官网采购报价：

SN74ACT7814-20DL，工作温度：0 to 70，封装：SSOP (DL)-56，包装数量MPQ：20个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74ACT7814-20DL的批量USD价格：9.677（1000+）

SN74ACT7814-40DL，工作温度：0 to 70，封装：SSOP (DL)-56，包装数量MPQ：20个，MSL 等级/回流焊峰值温度：Level-1-260C-UNLIM，引脚镀层/焊球材料：NIPDAU，TI官网SN74ACT7814-40DL的批量USD价格：6.156（1000+）

SN74ACT7814的评估套件：

SN74ACT7814的电路图解：

SN74ACT7814的评估套件：